Updated changelog

changelog/unreleased/lwshares-fix.md

@@ -1,7 +1,8 @@
-Bugfix: fix shares for external accounts
+Bugfix: Drop assumptions about user types when dealing with shares
 
-We may have external accounts with regular usernames (and with null uid):
-This patch decorates such usernames when storing them as Grantee in a share,
-such that when a share is retrieved, permissions are checked correctly.
+We may have external accounts with regular usernames (and with null uid),
+therefore the current logic to heuristically infer the user type from
+a grantee's username is broken. This PR removes those heuristics and
+requires the upper level to resolve the user type.
 
 https://github.com/cs3org/reva/pull/4849